Golf club grip and golf club

Abstract

An object of the present invention is to provide a golf club grip having good anti-slipping performance at hitting and improved head speed. The present invention provides a golf club grip comprising a cylindrical portion for inserting a shaft, wherein the cylindrical portion is formed from a rubber composition containing a base rubber and a crosslinking agent, the base rubber contains a nonpolar rubber in an amount of 50 mass % or more, and the cylindrical portion has a surface on which a plurality of minute projections having a height (h) of 0.07 mm or more and a minimum width (w1) at the bottom in a range from 0.2 mm to 0.8 mm are formed.

The invention claimed is: 
     
       1. A golf club grip comprising a cylindrical portion for inserting a shaft, wherein
 the cylindrical portion is formed from a rubber composition containing a base rubber and a crosslinking agent, 
 the base rubber contains a nonpolar rubber in an amount of 50 mass % or more, and 
 the cylindrical portion has a surface on which is formed a plurality of minute projections having a height (h) of 0.07 mm or more and a minimum width (w1) at the bottom of the projections in a range from 0.2 mm to 0.8 mm, and 
 wherein the minute projections have a three-dimensional shape that is a frustum, and a ratio (w3/w1) of a minimum width (w3) of an upper base to a minimum width (w1) of a lower base ranges from 0.3 to 1.0. 
 
     
     
       2. The golf club grip according to  claim 1 , wherein the cylindrical portion comprises a minute projection existence region where the minute projections exist in an amount of 150/1 cm 2  to 2500/1 cm 2 . 
     
     
       3. The golf club grip according to  claim 1 , wherein the minute projections have a ratio (h/w1) of the height (h) thereof to the minimum width (w1) of the bottom thereof in a range from 0.1 to 1.5. 
     
     
       4. The golf club grip according to  claim 1 , wherein the nonpolar rubber is at least one member selected from the group consisting of an isoprene rubber, a butadiene rubber, a styrene-butadiene rubber, a chloroprene rubber, a natural rubber, an ethylene-propylene rubber, an ethylene-propylene-diene rubber and a butyl rubber. 
     
     
       5. The gold club strip according to  claim 1 , wherein the rubber composition contains at least one oil absorbent selected from the group consisting of carbon black having a DBP absorption amount in a range from 50 cm 3 /100 g to 150 cm 3 /100 g, silica having a DBP absorption amount in a range from 100 cm 3 /100 g to 400 cm 3 /100 g, titanium oxide having a DBP absorption amount in a range from 10 cm 3 /100 g to 30 cm 3 /100 g and calcined kaolin having a DBP absorption amount in a range from 50 cm 3 /100 g to 100 cm 3 /100 g. 
     
     
       6. The golf club grip according to  claim 5 , wherein the rubber composition contains the oil absorbent in an amount ranging from 4 parts by mass to 20 parts by mass with respect to 100 parts by mass of the base rubber. 
     
     
       7. The golf club grip according to  claim 1 , wherein the base rubber consists of the nonpolar rubber. 
     
     
       8. The golf club grip according to  claim 1 , wherein the rubber composition has a material hardness in a range from 40 to 60 in Shore A hardness. 
     
     
       9. A golf club comprising a shaft, a head provided on one end of the shaft, and a grip provided on another end of the shaft, wherein
 the grip is a golf club grip comprising a cylindrical portion for inserting a shaft, 
 the cylindrical portion is formed from a rubber composition containing a base rubber and a crosslinking agent, 
 the base rubber contains a nonpolar rubber in an amount of 50 mass % or more, and 
 the cylindrical portion has a surface on which is formed a plurality of minute projections having a height (h) of 0.07 mm or more and a minimum width (w1) at the bottom of the projection in a range from 0.2 mm to 0.8 mm, and 
 wherein the minute projections have a three-dimensional shape that is a frustum, and a ratio (w3/w1) of a minimum width (w3) of an upper base to a minimum width (w1) of a lower base ranges from 0.3 to 1.0. 
 
     
     
       10. The golf club according to  claim 9 , wherein the cylindrical portion comprises a minute projection existence region where the minute projections exist in an amount of 150/1 cm 2  to 2500/1 cm 2 . 
     
     
       11. The golf club according to  claim 9 , wherein the minute projections have a ratio (h/w1) of the height (h) thereof to the minimum width (w1) at the bottom thereof in a range from 0.1 to 1.5. 
     
     
       12. The golf club according to  claim 9 , wherein the nonpolar rubber is at least one member selected from the group consisting of an isoprene rubber, a butadiene rubber, a styrene-butadiene rubber, a chloroprene rubber, a natural rubber, an ethylene-propylene rubber, an ethylene-propylene-diene rubber and a butyl rubber. 
     
     
       13. The golf club according to  claim 9 , wherein the rubber composition contains at least one oil absorbent selected from the group consisting of carbon black having a DBP absorption amount in a range from 50 cm 3 /100 g to 150 cm 3 /100 g, silica having a DBP absorption amount in a range from 100 cm 3 /100 g to 400 cm 3 /100 g, titanium oxide having a DBP absorption amount in a range from 10 cm 3 /100 g to 30 cm 3 /100 g and calcined kaolin having a DBP absorption amount in a range from 50 cm 3 /100 g to 100 cm 3 /100 g. 
     
     
       14. The golf club according to  claim 13 , wherein the rubber composition contains the oil absorbent in an amount ranging from 4 parts by mass to 20 parts by mass with respect to 100 parts by mass of the base rubber. 
     
     
       15. The golf club according to  claim 9 , wherein the base rubber consists of the nonpolar rubber. 
     
     
       16. The golf club according to  claim 9 , wherein the rubber composition has a material hardness in a range from 40 to 60 in Shore A hardness. 
     
     
       17. A golf club grip comprising a cylindrical portion for inserting a shaft, wherein
 the cylindrical portion is formed from a rubber composition containing a base rubber and a crosslinking agent, 
 the base rubber contains a nonpolar rubber in an amount of 50 mass % or more, 
 the rubber composition contains at least one oil absorbent selected from the group consisting of carbon black having a DBP absorption amount in a range from 50 cm 3 /100 g to 150 cm 3 /100 g, silica having a DBP absorption amount in a range from 100 cm 3 /100 g to 400 cm 3 /100 g, titanium oxide having a DBP absorption amount in a range from 10 cm 3 /100 g to 30 cm 3 /100 g and calcined kaolin having a DBP absorption amount in a range from 50 cm 3 /100 g to 100 cm 3 /100 g, and 
 the cylindrical portion has a surface on which is formed a plurality of minute projections having a height (h) of 0.07 mm or more and a minimum width (w1) at the bottom of the projection in a range from 0.2 mm to 0.8 mm. 
 
     
     
       18. The golf club grip according to  claim 17 , wherein the cylindrical portion comprises a minute projection existence region where the minute projections exist in an amount of 150/1 cm 2  to 2500/1 cm 2 . 
     
     
       19. The golf club grip according to  claim 17 , wherein the minute projections have a ratio (h/w1) of the height (h) thereof to the minimum width (w1) of the bottom thereof in a range from 0.1 to 1.5. 
     
     
       20. The golf club grip according to  claim 17 , wherein the nonpolar rubber is at least one member selected from the group consisting of an isoprene rubber, a butadiene rubber, a styrene-butadiene rubber, a chloroprene rubber, a natural rubber, an ethylene-propylene rubber, an ethylene-propylene-diene rubber and a butyl rubber. 
     
     
       21. The golf club grip according to  claim 17 , wherein the rubber composition contains the oil absorbent in an amount ranging from 4 parts by mass to 20 parts by mass with respect to 100 parts by mass of the base rubber. 
     
     
       22. The golf club grip according to  claim 17 , wherein the base rubber consists of the nonpolar rubber. 
     
     
       23. The golf club grip according to  claim 17 , wherein the rubber composition has a material hardness in a range from 40 to 60 in Shore A hardness. 
     
     
       24. A golf club comprising a shaft, a head provided on one end of the shaft, and a grip provided on another end of the shaft, wherein
 the grip is a golf club grip comprising a cylindrical portion for inserting a shaft, 
 the cylindrical portion is formed from a rubber composition containing a base rubber and a crosslinking agent, 
 the base rubber contains a nonpolar rubber in an amount of 50 mass % or more, 
 the rubber composition contains at least one oil absorbent selected from the group consisting of carbon black having a DBP absorption amount in a range from 50 cm 3 /100 g to 150 cm 3 /100 g, silica having a DBP absorption amount in a range from 100 cm 3 /100 g to 400 cm 3 /100 g, titanium oxide having a DBP absorption amount in a range from 10 cm 3 /100 g to 30 cm 3 /100 g and calcined kaolin having a DBP absorption amount in a range from 50 cm 3 /100 g to 100 cm 3 /100 g, and 
 the cylindrical portion has a surface on which is formed a plurality of minute projections having a height (h) of 0.07 mm or more and a minimum width (w1) at the bottom of the projection in a range from 0.2 mm to 0.8 mm. 
 
     
     
       25. The golf club according to  claim 24 , wherein the cylindrical portion comprises a minute projection existence region where the minute projections exist in an amount of 150/1 cm 2  to 2500/1 cm 2 . 
     
     
       26. The golf club according to  claim 24 , wherein the minute projections have a ratio (h/w1) of the height (h) thereof to the minimum width (w1) at the bottom thereof in a range from 0.1 to 1.5. 
     
     
       27. The golf club according to  claim 24 , wherein the nonpolar rubber is at least one member selected from the group consisting of an isoprene rubber, a butadiene rubber, a styrene-butadiene rubber, a chloroprene rubber, a natural rubber, an ethylene-propylene rubber, an ethylene-propylene-diene rubber and a butyl rubber. 
     
     
       28. The golf club according to  claim 24 , wherein the rubber composition contains the oil absorbent in an amount ranging from 4 parts by mass to 20 parts by mass with respect to 100 parts by mass of the base rubber. 
     
     
       29. The golf club according to  claim 24 , wherein the base rubber consists of the nonpolar rubber. 
     
     
       30. The golf club according to  claim 24 , wherein the rubber composition has a material hardness in a range from 40 to 60 in Shore A hardness.